Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Is this possible to synchronize the two different ratings of dg

1 3759

what is the ground clearance of 400KV transmission line?

Power Grid, wbsedcl,

9 31128

We have 750KVA DG set, we want to introduce REF relay with 1250/1A,CL PS,Current transformers.The lead distance of 2.5mm copper flexible cable from CT to relay is around 5mtrs.We would like to know the knee point votage(VK) & IM calculion for CT's

1465

what do you mean by the "bay" in a switchyard? how to determine exact number of bays in a substation?

Essar, L&T,

8 65550

my question is that....few days ago i had installed a three phase motor starter for an electric saw.the motor will run and make the hydraulic pressure which will be goes to pressure cylender by up and down lever.two number of limitswitches are also installed on cylinder for safety of motor.now when the arm of cylinder reaches to the upper or lower limit it will cut the motor's line.and motor will be stop.now wana know that what will i do that motor runs continue after the limitswitch cut it down but it shold not be made any pressure.pls answer me in brief.

3 3525

I want to calculate how much capacitor we connect to maintain the unity power factor? Is there any formula? Pls give me the answer

1461

Among the following Which is vector quantity? a. Flux b. permitivity c. flux density d. magnetic intensity

2 3589

how much allowable resistance that can be difference in motor all coils?

1838

how can check the resistance of battery contact?

Cipla,

1789

While DG is on Load? we can start the capacitor bank?

Inorbit,

3 4732

What should be the earth pit resistance value?

BARC,

7 27049

I HAVE A INCOMING 100A MCCB TPN 25KA, CABLE LENGHT OF 80M 70MM CABLE SIZE FROM MAIN SUBBOARD TO NEW DB.BASE ON THE FAULT LEVEL SETTING OF 45KA.I WOULD LIKE TO FIND OUT 25KA ENOUGH KA. APPRECIATE IF SOMEBODY CAN ASSIST ME WITH FORMULA FOR THIS. FRM: JEFF

3537

HOW WORK HEAT PLATE EXCHANGER

1541

What will happen if supply frequency change in Transformer KVA rating ?

1 5156

What is the method of estamating of cable, CB,MCB ?

1692


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Un-Answered Questions { Electrical Engineering }

What is the minimum value of hfe for the oscillations in transistorized rc phase shift oscillator?

785


How can we select suitable capacity generator for three phase load (inductive load) and how to take study analysis in 3 three phase load system ?

1685


Is RTCC panel needs any control supply.

1518


State angle criterion.

677


My load is 1635 KW. & current pf is 0.884, I have to improve it for 0.99.Please suggest what KVAR value is needed?

1206






what is the eight bit unit?

1990


Why do we use copper cable for HT Supply and why not Aluminium?

1550


what does vector group Dyn11 tell us? also tell me how will u differentiate between phase lead and phase lag thru this vector group

1627


what is transient stability analysis means?

1683


How can you calculate the size of the down conductor cable for the lightning protection system. Is 70mm2 cable can replace 95mm 2 bare copper cable when the copper tape size is 25Wx3 thk mm.

4967


what happens in the short circuited secondary transformer,if the resistance of the short circuit is increased gradually?

1934


whats the existence of reactive power and when it arises?

1643


How can we calculate the KVA rating of a Distribution transformer from its core details?

1624


I want definition for ABT Meter (Availability Based tariff) ?

1550


What is the formula for selecting the cabels according to load? How to calculate what sq.mm cabel to be used?

1001